CPC Subgroup
H01J 29/64 Magnetic lenses
Full Title
Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00 > Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement > Arrangements for focusing or reflecting ray or beam > Magnetic lenses
2 direct subcodes
Child Classifications
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- H01J 29/66 using electromagnetic means only
- H01J 29/68 using permanent magnets only